Doffing means for ring-spinning machines.



No. 880,014. PAI'ENTED FEB. 25, 1908. R. L. GUMNOGK.

DOFFING MEANS FOR RING SPINNING MACHINES.

APPLICATION FILED NOV. 7. 1906.

UNITED STATES PAINT, @FFIC it.

, ROBERT L. CUMNOCK, OF ANDERSON, SOUTH CAROLINA.

DOFFING MEANS FOR RING-SPINNING MAGHINES.

. No. 880,014., I

To all whom it may concern:

Be it known that I, ROBERT L. CUMNOCK, acitizen of the United States, residing at Anderson, South Carolina, have invented certain new and useful Improvements in Doffing Means for Ring-Spinning Machines, of which the following is a specification.

- My invention relates to the art of ring spinning and twisting," and particularly to means whereby the operation. of dotting may be expeditiously'and accurately performed.

Heretofore. in dotting thebobbin or quill it has been customary to perform what is known as stick dofling, in which the attendant takes off the bobbin and winds the thread or sliver around the s indle and then breaks the thread leaving t e spindle with the thread attached thereto by. winding ready to receive another bobbin, which having been pla'ce d on the spindle receives the thread thereon when the spindle is set in rotation. This operation of. dofling is obj ectionable for many reasons. Skilled operators are required, 'butthreads are often imperfectly attached and are broken down as a result of carelessness leaving-the new bobbin without an end to begin twisting and winding, This method of dofiing bywinding on to the spindle in orfir to attachthe thread thereto for winding on to anew bobbin is also objectionable because of the accumulation of waste-0n the spindle. This will collect at the lower portion of the spindle and will prevent the new bobbin from going fully to its place thereon. This accumulation will also prevent the bobbin from being properly seated and the bobbinwill therefore s 'p in relationto the 'spindlefresulting in imperfectly wound bo bins and conse- .q uently in im erfect work in the weaving. e old method of dofling, thel'urther, by t end of the thread left on the bobbin is some times short and some times long, and it is often necessary for the operator to unwind the bobbin to a certain extent inorder to place it in proper condition for weaving.

- Again, under the old method, waste thread will accumulate withinthe hollow quill of the bobbin andthis must be cleared out by the. operator before'the bobbin is laced in the shuttle. With my inventiont e thread is not wound upon the s indle at all, and in doffing the thread is brolien at recisely the same point in relation to the be bin, that is, at the base thereof at each operation; and

Specification of Letters Patent. Application filed November 7- 1906. Serial 110.342.401-

Patented. Feb. 25, 1903.

when the doffing is performed, the bobbin is in proper condition for placing in theloom without further attention on the part of the operator. v

The invention consists in the features,

combination and arrangement of arts hereinafter described and particular pointed out in the claims.

In the accompanying drawings,.Figure 1 represents a spindle of a spinning and twisting machine with a ring rail in proper relation thereto and with my improvements attached. Fig. 2 is a lan view showing the s indle in'section an my improvement in p ace.

In theseidrawings, 1, indicates a spindle of a ring spinning machine having thereon the pulley 2 by which the spindle is driven. This 1 spindle is of substantially ordinary form, having the portion 3 upon which the base of the quill or bobbin engages to be revolved with the said spindle.

In carrying out my invention I plaza on the spindle just below the portion 3 and between it and the whirl or pulley 2, a collar 4 havin a flange 5 at its upper edge which lies close elow the base cf the bobbin. This flange extends entirely around the collar and it is provided with a series of serrations or notches 6 which extend inwardly at a slight angle to the radii of the collaror flange.

inner to the outer ends in the direction of rotation The ring rail is shown at 7 and is of substantially ordinary form having any suitable form of traveler throughwhich the thread passes before passing to the spindle or bobbin. This ring r'ail is to be operated in any suitable manner. Now when the dofhng action These notches incline forwardly from their is to be performed, the ring rail is given an excess movement downwardly so that the thread or sliver instead of being directed to the bobbin will be carried downwardly across the notched flangeof the dofiing collar above mentioned so that in the continuedrevolution the spindle the said thread or sliver will be wound a number of times around this collar just below the flange. In being 'carried' across the said flange the thread or sliver is engaged by the forwardly directed edge of "the notch and itis thus prevented from slipping and its winding on the collar is thus insured. When the thread has been thus wound around the collar, the operator by a 2O left entirely free for receiving a fresh bobbin The breaking is done with certainty and the broken end always occursat substantially the same point, thus relieving the attendant ofthe necessity of unwinding the thread in order to place the bobbinin proper condition for further use, and preventing the oecurrenc-eof long loose ends which interfere with proper weaving.

It will be seen" from the above that the waste or wrappings necessarily resulting in the dofling' operation, do not attach themselves to the spindle, and said spindle is thus which Willreadily seat itself in proper posi tion thereon and in substantially the same position as all the other bobbins on the other spindles, so that a uniform result is attained in the Winding and twisting operations. As inordinary practice, the waste may be re moved eriodically by simply cutting it fromthe do 'ng collar,

I may increase the height of the spindle so as to bring the dofiing collar higher in rela tion to the ring rail so that the said ring rail,

with the movement which. it has-in ordinarv practice, will carry the thread below the flange when the dotting action is to take place. a

I do not limit myself to the particular form of spindle shown nor to the particular arrangement of devices associated therewith.

I I claim as my invention In ring spinning machinery and 1n combinatlon, a spindle, and a flange on said spindle below the bobbin projectinghorizontally I and having notches extending from its edge at an angle to the radii presenting forwardly directed openings to receive the yarn, substantially as described.

In testimony whereof, I aflix my signature in presence of two witnesses.

ROBERT L. CUMNOCK.

Witnesses J. R. RICE, O. J. BROOKE. 

